add support for 'connect_timeout' option for redis arrays

Conflicts:
	redis_array.c
	redis_array_impl.c
	redis_array_impl.h

redis_array.h

@@ -45,6 +45,7 @@ typedef struct RedisArray_ {
 	zval *z_fun;			/* key extractor, callable */
 	zval *z_dist;			/* key distributor, callable */
 	zval *z_pure_cmds;		/* hash table */
+	double connect_timeout; /* socket connect timeout */
 
 	struct RedisArray_ *prev;
 } RedisArray;